<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<iframe id="i" src="/common/blank.html"></iframe>
<script>
async_test(t => {
  window.onload = t.step_func(() => {
    let target_key = i.contentWindow.navigation.currentEntry.key;
    let target_id = i.contentWindow.navigation.currentEntry.id;
    i.contentWindow.navigation.navigate("?foo");
    i.onload = t.step_func(() => {
      let beforeunload_called = false;
      i.contentWindow.navigation.onnavigate = t.step_func_done(e => {
        assert_true(beforeunload_called);
        assert_equals(e.navigationType, "traverse");
        assert_false(e.cancelable);
        assert_false(e.canIntercept);
        assert_false(e.userInitiated);
        assert_false(e.hashChange);
        assert_equals(e.downloadRequest, null);
        assert_equals(new URL(e.destination.url).pathname, "/common/blank.html");
        assert_false(e.destination.sameDocument);
        assert_equals(e.destination.key, target_key);
        assert_equals(e.destination.id, target_id);
        assert_equals(e.destination.index, 0);
        assert_equals(e.formData, null);
        assert_equals(e.info, "hi");
        // NavigateEvent sourceElement is still in development, so test whether it is available.
        if ("sourceElement" in e) assert_equals(e.sourceElement, null);
      });
      i.contentWindow.onbeforeunload = () => beforeunload_called = true;
      assert_true(i.contentWindow.navigation.canGoBack);
      i.contentWindow.navigation.back({ info: "hi" });
    })
  });
}, "navigate event for navigation.back() - cross-document");
</script>
